From Event: SPIE Optical Engineering + Applications, 2017
Previously, a single CCD camera has been used to record holograms of an object while the object is rotated about a single axis to reconstruct a pseudo-3D image, which does not show detailed depth information from all perspectives. To generate a true 3D image, the object has to be rotated through multiple angles and along multiple axes. In this work, to reconstruct a true 3D image including depth information, a die is rotated along two orthogonal axes, and holograms are recorded using a Mach-Zehnder setup, which are subsequently numerically reconstructed. This allows for the generation of multiple images containing phase (i.e., depth) information. These images, when combined, create a true 3D image with depth information which can be exported to a Microsoft® HoloLens for true 3D virtual reality.
A. Downham, U. Abeywickrema, and P. P. Banerjee, "True 3D digital holographic tomography for virtual reality applications," Proc. SPIE 10396, Applications of Digital Image Processing XL, 1039614 (Presented at SPIE Optical Engineering + Applications: August 09, 2017; Published: 19 September 2017); https://doi.org/10.1117/12.2275782.
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